; (function () {
    let piceImg = document.querySelectorAll('.pics_img img');
    let previous = document.getElementsByClassName('previous');
    let next = document.getElementsByClassName('next');
    let dotItemList = document.querySelectorAll('.dot dot-item');

    // 点击上一页
    previous.click = function () {
        console.log(piceImg)
    }
})()